Inking mechanism for rotary printing presses



OCt- 30, 1934 A T. E. PHYTHIAN 1,978,760

INKING MECHANISM FOR ROTARY PRINTING PRESSES Filed Sept. 24, 1931 2 Sheets-Sheet l I n een t or Oct. 30, 1934. T E PHYTH|AN 1,978,760

INKING MECHANISM FOR ROTARY PRINTING PRESSES Filed Sept. 24, v1931 2 Sheets-Sheet 2 Fig.2.

lnvenor by [d im;

Attorney.

Patented Oct. 30, 1934 INKING MECHANISM FOR ROTARY PRINTNG PRESSES Y, Thomas Ewart Phythian, Headingley, Leeds,

England Application September 24, 1931, Serial No. 564,863 In Great Britain October 8, 1930 3 Claims. V(Cl. lOl-351) This invention relates to inking mechanism for printing machines of the type in which ink is by capillary attraction taken up by a rapidly rotating drum from the fountain roller for dis- 5 tribution and application to the printing cylinder or printing surface, and especially to inking mechanism of the kind described in the specification of application for British Letters Patent No. 331,570.

In such mechanism ink is continuously fed to the rapidly rotating ink drum so long as the rotary elements of the printing machine are in movement. If there are no plates on the plate cylinders of the machine the ink collects on the ink drums and ink rollers so that when plates are inserted and paper is fed through the Inachine an excess of ink is supplied over and above the requirements when the printing machine is set into operation. Further, in the event that the paper web breaks, the paper may adhere to the ink rollers and ink drums and gather in the space between them.

The invention has for its object to avoid these disadvantages.

According to the invention the ink fountain is so mounted that it may be moved into and out of the operative position in relation to the ink fountain roller or the ink drum.

According to the invention, moreover, the ink fountain roller may be so mounted in relation to the ink drum that it may be moved from its position of proximity thereto when it is not required to supply ink to the said ink drum,

According to the invention, moreover, the ink fountain together with the ink fountain roller may be adapted for movement or adjustment of position to bring the ink fountain roller out of proximity to the ink drum.

According to the invention, also, the movement ed' of the ink fountain roller or of the said roller and the ink fountain may be effected at the moment when the inking rollers are moved away from the inking drum and may be eifected by co-operating mechanism.

The invention further comprises the features of construction hereinafter described.

An example of inking mechanism in accord- ;ance with the invention is illustrated in the accompanying diagrammatic drawings. Figure 1 is a side view of the mechanism.

Figure 2 is a view at right angles to Figure 1 showing certain parts of the mechanism.

In carrying the invention into effect according to a particular construction, the ink fountain -a, is pivotally mounted upon an axis b parallel with the axis of the fountain roller a1 and to the rear thereof and is supported adjacent to or forward of the ink fountain roller by a link or connecting rod c which passes loosely through a clearance hole in a swivel pin a3 mounted in for example, by a handle or other operating mechanism f, so that the lower end of the link or connecting rod c is raised or lowered, as the case may be, to the extent of twice the eccentricity of the eccentric d to bring the fountain a into and out of the operative position. The said means of support for the fountain a may be duplicated at the two ends thereof.

The operative position of the ink fountain roller a1 in relation to the corresponding inking drum may be readily determined and adjusted by means of an adjusting screw or stop g mounted in a bracket h of xed position and adapted to bear upon the fountain body or a lug or bracket a2 thereon, such as that carrying the swivel pin a3 through which passes the link or connecting rod c. Thus, according to the adjustment of the said stop g, the fountain d will be arrested in its upward movement irrespective of the possible continued upward movement of the link or connecting rod c, with the consequent increase of compression of the buffer or cushioning spring c2.

The spindle or shaft e carrying the eccentric d may be the shaft whereby a movement is given to the frame i carrying the inking rollers i to move these out of contact with the ink drum lc or out of engagement with the plate cylinder or the like. Thus, the frame i may be connected to parallel rods Z which are coupled by xed links m in which are provided bearings for the spindle e. The latter vmay have xedly mounted upon it an eccentric n, the strap of which is pivoted at o to the machine frame. When the handle f is operated the partial rotation of the spindle e causes the complete assembly to move laterally with respect to the pivots o to withdraw the ink` ing rollers y'.

It will be understood that when the fountain roller a1 is mounted in the fountain a it will be subjected to the movements given to the fountain tion of the mechanism effecting the desired movement of the fountain, or of the fountainroller,

may be coupled by suitable mechanism to the tripping mechanism of the printing` machine, to.- ensure that in the event of breakage of the web" the supply of ink to the ink drums is out off.

I claimz- 1. Inking mechanism for rotary printing presses, comprising inking means consisting of an ink fountain and a fountain roller, the said ink fountain being mounted for a limited movement of rotation in both directions about a pivotal axis, an operating eccentric ywith axis parallel with the said pivotal axis of the fountain, means for suspending said fountain from said eccentric, an inking drum fed by the said fountain roller, a main inking drum and inking rollers co-operating therewith, the said fountain being moved on op eration o-f the eccentric to separate the fountain roller from the inking drum fed by it and to return it into engagementtherewith, and means for separating the inking rollersl from the main inking drum and returning them into contact therewith, said means comprising a rotary element with which the eccentric effecting the movement of the ink fountain is in operative connection.

2. Inking mechanism for rotary printing presses, comprising inking means consisting of an ink fountain and a fountain roller, an inking drum fed by the said fountain roller, a main inking'drum and inking rollers `contacting therewith, a control element revolvable in two directions about va xed axis for throwing said inking rollers out of contact with the said main inklng drum, a pivotal support for one of the elements of the said inking means, and a second support for the said element linked to the control means whereby movement may be imparted from said control means to separate the fountain roller from the inking drum.

3. Inking mechanism for rotary printing lpresses, comprising inking means consisting of an ink fountain and a fountain roller, the said fountain being adapted for movement about a pivotal axis, an inking drum fed by the sai-d fountain roller, a main inking drum and inking rollers contacting therewith a control element revolvable in two directions about a fixed axis, a link connecting said ink fountain to said control element for imparting a movement of rotation tothe said ink fountain in both directions about the said axis to separate the fountain roller from the inking drum and to return it into engagement, and means for supporting the inking rollers from the main inking drum and returning them into contact therewith, said means comprising a control element in operative connection with the control element of the ink fountain.

THOMAS EWART PHYTHIAN.

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